DC motor rotation information detecting device
US7122982B2 · kind B2 · utility
20Cited by
50References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 2005 |
| Grant date | Oct 17, 2006 |
| Priority date | — |
| Expiry date | May 26, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S388/909
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rotation information detection device detects rotation information of a DC motor based on a surge component waveform superimposed on a voltage waveform between the terminals of the DC motor or a current waveform of the DC motor, a circuit is provided which supplies a current of a current value Ipwm 45% during motor forward rotation or Ipwm 55% during reverse motor rotation to the motor over the period from when the motor starts braking operation to when it stops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.